The Zilcha criteria for dynamic inefficiency reconsidered

We reconsider necessary and sufficient conditions for dynamic inefficiency given in Zilcha (J Econ Theory 52:364–379, 1990, J Econ Theory 55:1–16, 1991) and a critique by Rangazas and Russell (2005). First, we show that the characterization given in Zilcha (1990) for nonstationary economies is correct and correct Zilcha’s proof. Second, using this insight, we complement Rangazas and Russell’s (Econ Theory 26:701–716, 2005) discussion of the counterexamples to Zilcha (J Econ Theory 55:1–16, 1991). Third, we discuss consequences of our results for applied tests of (in-)efficiency based on the Zilcha criteria. We would like to thank Itzhak Zilcha, and in particular Peter Rangazas and Steve Russell for detailed and very helpful comments.     

Improving R&D/Marketing relations: R&D's perspective

Abstract
Successful product innovation hinges on close R&D/marketing relationships, especially in technology-based organizations. However, there is evidence that linkage problems are common and when they are not overcome failure is the usual result.
R&D's perspective on what R&D, marketing and senior management can do to improve their relationship with marketing is presented. The recommendations are based on suggestions from R&D directors involved in new product development efforts in 83 technology-based companies. Also presented is how the need for integration has changed over time and where it is going in the future.     

The Determination of Agricultural Wage Rates in Bangladesh

The impact of the ‘green revolution’ on wages has been a contentious issue. This paper uses the cointegration and error correction approach to identify long and short-run relationships between prices, agricultural production and wages of agricultural labourers in Bangladesh, test for homogeneity, test for weak exogeneity with the Johansen-Juselius methodology, test for a structural break, and estimate the long and short-run elasticities of nominal wages with respect to rice prices. We find that agricultural wages have strong positive long run relationships with rice prices, manufacturing wages and agricultural productivity. The short run response of wages, estimated consistently with these longer run relationships, to rice prices is small, highlighting the vulnerability of the rural poor to sudden rises in rice prices, even though in the longer run nominal wages respond sufficiently to rice prices. Policy can promote growth of agriculture and manufacturing but should also mitigate the short run food insecurity of agricultural labourers.     

Does accounting conservatism deter short sellers?

Review of Quantitative Finance and Accounting - We examine the impact of the corporate information environment on short selling by testing the relationship between short interest and accounting...     

Impact of off-farm labor supply on food expenditures of the farm household

Farm households diversify their income sources by working off the farm. This is a risk management strategy that is used by farm households in both developed and developing countries. Income diversification via off-farm work is associated with higher incomes and food consumption. However, little is known about the association between off-farm work and farm household food expenditures. In an effort to bridge this gap, this study attempts to assess the impact of off-farm work decisions by the operator and/or the spouse on the food expenditures of the farm household. Using a nationwide farm household survey in the United States and new econometric method, we find that the decisions of the operator and/or the spouse to work off the farm are significantly interrelated (29%). However, these two decisions affect food expenditures in different ways. The operator’s off-farm work decision is positively related to food expenditures, while the spouse’s decision is negatively associated with expenditures on food by the farm household.     

Product quality and the theory of comparative advantage

We develop a simple model to investigate the possibility that two countries that differ significantly in income levels may be unable to gain from trading with each other. We consider two countries with identical preferences and different technologies. There are two types of goods: one homogeneous, and one quality-differentiated. We show that if one country has an absolute advantage in both types of goods, then no trade may be possible between the two countries, despite differences in relative autarky prices.     

Do supervisory inputs matter in a capital-intensive industry? Some evidence from a Japanese car transplant

We estimate a translog production function based on data from a Japanese automobile plant in the Midwest where output is determined by capital and different supervisory time inputs. We fit a model which allows for heteroskedastic errors, where this heteroskedasticity is a function of various variables affecting perceived target severity. We find that while, as expected, capital inputs are important, each supervisory time input is also significant in this capital-intensive industry. Linear homogeneity in these inputs is rejected. We find evidence of asymmetry in substitution among different components of supervisory time. This asymmetry has implications for the design and allocation of supervisory tasks. © 1997 John Wiley & Sons, Ltd.     

An econometric study on the relationship between unemployment and vacancies in the United Kingdom

Zusammenfassung Eine ?konometrische Studie über die Beziehung zwischen Arbeitslosigkeit und offenen Stellen im Vereinigten K?nigreich. — Dieser Aufsatz soll zeigen, da\ die stabile Beziehung zwischen echter Arbeitslosigkeit und echten offenen Stellen seit 1966 unterbrochen ist. Au\erdem sollen die Faktoren untersucht werden, die die Beziehung zwischen echter Arbeitslosigkeit und echten offenen Stellen bestimmen, wobei einerseits ein ?konometrisches Modell, das auf nichtbeobachtbare Variable besonders eingeht, und andererseits eine neoklassische Theorie der überschu\nachfrage herangezogen wird. Die allgemeine Hypothese in diesem Artikel lautet, da\ sowohl die echte als auch die registrierte oder gemessene H?he der Arbeitslosigkeit infolge verschiedener Gesetze und/oder des Rückgangs der wirtschaftlichen Aktivit?t angestiegen ist. Anschlie\end werden zwei weitere Modelle konstruiert, um die Rolle der Nachfrage- und Angebotsfaktoren zu analysieren.

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Résumé Une étude économétrique sur la relation entre le ch?mage et les vacances en Royaume-Uni. — Le but de cet article est de démontrer que la relation stable entre le vrai ch?mage et les vrais vacances a croulé depuis 1966 et d’analyser les facteurs qui déterminent les relations entre le vrai ch?mage et les vrais vacances en appliquant séparément des modèles économétriques avec des variables inobservables et une théorie néoclassique de la demande d’excès. Notre hypothèse générale est que le montant du vrai ch?mage et le montant du ch?mage régistré ou mesuré augmentaient comme conséquence de la législation gouvernementale et/ou de la baisse de l’activité économique. Finalement, l’auteur construit deux modèles de plus pour analyser le r?le des facteurs de demande et d’offre.

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Resumen Un estudio econométrico sobre la relación entre empleo y vacantes en el Reino Unido. — Los objetivos de este artículo son mostrar que la relación estable entre desempleo verdadero y vacantes verdaderas se ha quebrado a partir de 1966 y también analizar los factores subyacentes a las relaciones de desempleo verdadero y vacantes verdaderas separadamente, usando modelos econométricos con variables no observables y una teoría neoclásica de exceso de demanda. Nuestra hipótesis general es que tanto la cantidad verdadera de desempleo y el desempleo registrado o medido creció como consecuencia de la legislación gubernamental y/o la declinación en la actividad económica. Finalmente, formulamos dos modelos adicionales para analizar el rol de factores de demanda y oferta.